GM Service Manual Online
For 1990-2009 cars only

Diagnostic Trouble Code (DTC) Identification Diagnostic Types

DTC

Description

DTC Type*

Default Action

P0218

Automatic Transmission Fluid over Temperature

C

    â€¢ DTC P0218 is stored in PCM memory
        IDLE ENGINE TRANSMISSION HOT message displays

P0502

Vehicle Speed Sensor-Low Input

A

    â€¢ DTC P0502 stores in PCM memory
    â€¢ SERVICE ENGINE SOON, SPEED SENSOR FAULT displays
    â€¢ Default line pressure
    â€¢ Inhibit TCC
    â€¢ Disable upshift and steady state adapts
    â€¢ Inhibit torque management
    â€¢  Disable cruise control
    â€¢ Calculate VSS from ISS and commanded gear

P0503

Vehicle Speed Sensor-Intermittent

A

    â€¢ DTC P0503 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SPEED SENSOR FAULT displays
    â€¢ Inhibit TCC
    â€¢ Default line pressure
    â€¢ Disable upshift and steady state adapts
    â€¢ Inhibit torque management
    â€¢ Calculate VSS from ISS and commanded gear

P0711

Automatic Transmission Fluid Temperature Sensor-Range/Performance

D

    â€¢ DTC P0711 is stored in PCM memory
    â€¢ If any engine coolant temperature sensor codes are set, then the transmission defaults to a temperature of 132°C (269°F)
    â€¢ If the engine coolant temperature is greater than 110°C (230°F), then the transmission will default to a temperature of 132°C (269°F). This will enable Transmission Hot Mode. The transmission remains in Hot Mode until the engine coolant temperature drops below 105°C (221°F). If the engine run time is less than 5 min, then the transmission defaults to the intake air temperature at ignition ON.
    â€¢ If the engine coolant temperature is between 70°-110°C (158°-230°F), then the transmission default temperature equals ECT - 10°C when the intake air temperature is less than 80°C (176°F) at ignition ON. If the intake air temperature is greater than 80°C (176°F) at ignition ON, then the transmission default temperature equals ECT + 10°C.
    â€¢  If none of the above conditions exist, then the transmission default temperature is 80°C (176°F)

P0712

Automatic Transmission Fluid Temperature Sensor-Low Input

D

    â€¢ DTC P0712 is stored in PCM memory
    â€¢ If any engine coolant temperature sensor codes are set, then the transmission defaults to a temperature of 132°C (269°F)
    â€¢ If the engine coolant temperature is greater than 110°C (230°F), then the transmission will default to a temperature of 132°C (269°F). This will enable Transmission Hot Mode. The transmission remains in Hot Mode until the engine coolant temperature drops below 105°C (221°F) If the engine run time is less than 5 min, then the transmission defaults to the intake air temperature at ignition ON.
    â€¢ If the engine coolant temperature is between 70°-110°C (158°-230°F), then the transmission default temperature equals ECT - 10°C when the intake air temperature is less than 80°C (176°F) at ignition ON. If the intake air temperature is greater than 80°C (176°F) at ignition ON, then the transmission default temperature equals ECT + 10°C.
    â€¢  If none of the above conditions exist, then the transmission default temperature is 80°C (176°F)

P0713

Automatic Transmission Fluid Temperature Sensor-High Input

D

    â€¢ DTC P0713 is stored in PCM memory
    â€¢ If any engine coolant temperature sensor codes are set, then the transmission defaults to a temperature of 132°C (269°F)
    â€¢ If the engine coolant temperature is greater than 110°C (230°F), then the transmission will default to a temperature of 132°C (269°F). This will enable Transmission Hot Mode. The transmission remains in Hot Mode until the engine coolant temperature drops below 105°C (221°F) If the engine run time is less than 5 min, then the transmission defaults to the intake air temperature at ignition ON.
    â€¢ If the engine coolant temperature is between 70°-110°C (158°-230°F), then the transmission default temperature equals ECT - 10°C when the intake air temperature is less than 80°C (176°F) at ignition ON. If the intake air temperature is greater than 80°C (176°F) at ignition ON, then the transmission default temperature equals ECT + 10°C.
    â€¢  If none of the above conditions exist, then the transmission default temperature is 80°C (176°F)

P0716

Automatic Transmission Input Speed Sensor-Range/Performance

A

    â€¢ DTC P0716 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Inhibit TCC
    â€¢ Disable upshift, steady state and garage shift adapts
    â€¢ Calculate ISS from VSS and commanded gear

P0717

Automatic Transmission Input Speed Sensor-No Signal

A

    â€¢ DTC P0716 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Inhibit TCC
    â€¢ Inhibit torque management
    â€¢ Disable upshift, steady state and garage shift adapts
    â€¢ Calculate ISS from VSS and commanded gear

P0719

TCC Brake Switch Circuit Low

C

    â€¢ DTC P0719 is stored in PCM memory
    â€¢ SERVICE ELECTRICAL SYSTEM displays
    â€¢ Disable garage shift adapts
    â€¢ Extended travel or brake lamp switch is used by the PCM

P0724

TCC Brake Switch Circuit High

C

    â€¢ DTC P0724 is stored in PCM memory
    â€¢ SERVICE ELECTRICAL SYSTEM displays
    â€¢ Disable garage shift adapts
    â€¢ Extended travel or brake lamp switch is used by the PCM

P0730

Incorrect Gear Ratio

C

    â€¢ DTC P0730 is stored in PCM memory
    â€¢ SERVICE TRANSMISSION displays
    â€¢ Maximum line pressure
    â€¢ Inhibit torque management
    â€¢ Disable upshift, steady state and garage shift adapts

P0741

Torque Converter Clutch System Stuck OFF

A

    â€¢ DTC P0741 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Inhibit TCC
    â€¢ Inhibit 4th gear in Hot Mode

P0742

Torque Converter Clutch System Stuck ON

A

    â€¢ DTC P0742 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Inhibit TCC
    â€¢ Inhibit 4th gear in Hot Mode

P0748

Pressure Control Solenoid Electrical

C

    â€¢ DTC P0748 is stored in PCM memory
    â€¢ SERVICE TRANSMISSION displays
    â€¢ Inhibit torque management
    â€¢ Disable upshift, steady state and garage shift adapts

P0751

1-2 Shift Solenoid Valve Performance

A

    â€¢ DTC P0751 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Default to 2nd gear
    â€¢ Inhibit TCC
    â€¢ Inhibit torque management
    â€¢ Disable steady state and garage shift adapts

P0753

1-2 Shift Solenoid Valve Electrical

A

    â€¢ DTC P0753 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Default to 2nd gear
    â€¢ Inhibit TCC
    â€¢ Inhibit torque management
    â€¢ Disable steady state and garage shift adapts

P0756

2-3 Shift Solenoid Valve Performance

A

    â€¢ DTC P0756 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Default to 2nd gear
    â€¢ Inhibit TCC
    â€¢ Inhibit torque management
    â€¢ Disable steady state and garage shift adapts

P0758

2-3 Shift Solenoid Valve Electrical

A

    â€¢ DTC P0758 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Default to 2nd gear
    â€¢ Inhibit TCC
    â€¢ Inhibit torque management
    â€¢ Disable steady state and garage shift adapts

P1810

Automatic Transmission Fluid Pressure Manual Valve Position Switch

A

    â€¢ DTC P1810 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Default line pressure
    â€¢ Inhibit TCC
    â€¢ Inhibit torque management
    â€¢ Disable steady state and garage shift adapts

P1811

Maximum Adapt and Long Shift

C

    â€¢ DTC P1811 is stored in PCM memory
    â€¢ SERVICE TRANSMISSION displays
    â€¢ Maximum line pressure
    â€¢ Inhibit torque management
    â€¢ Disable upshift, steady state and garage shift adapts

P1814

Torque Converter Overstress

D

DTC P1814 is stored in PCM memory

P1860

Torque Converter Clutch Solenoid Valve Electrical

A

    â€¢ DTC P1860 is stored in PCM memory
    â€¢ SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    â€¢ Inhibit TCC
    â€¢ Inhibit 4th gear in Hot mode

*DTC Types:

    â€¢ A-Emission-related, turns the MIL ON after the first failure.
    â€¢ B-Emission-related, turns the MIL ON after two consecutive trips with failure.
    â€¢ C-Non-emission-related, message displayed.
    â€¢ D-Non-emission-related, no lamps and no message.